<template>
    <div>
        <div ref="refChart" style="width: 100%;height:15.625rem;"></div>
    </div>
</template>
  
<script setup lang="ts">
import {onUnmounted, onMounted, ref,markRaw } from 'vue';
import * as echarts from 'echarts';
import {RequestStatisticGetCarNumOfMonth} from '@/api/path/index.js';
type EChartsOption = echarts.EChartsOption;
const refChart = ref();
const chartInstance = ref();
const chartData = ref();

// 获取接口数据
const getData = () => {
  return new Promise((resolve, reject) => {
    RequestStatisticGetCarNumOfMonth()
      .then((res: any) => {
        chartData.value = res.resultObj;
        resolve(res.resultObj);
      })
      .catch((err: any) => {
        reject(err);
      });
  });
};
onMounted(async () => {
  await getData();
  // 图表初始化
  initChart();
  // 调用Echarts图表自适应方法
  screenAdapter();
  // Echarts图表自适应
  window.addEventListener('resize', screenAdapter);
});

const initChart = () => {
  chartInstance.value =markRaw(echarts.init(refChart.value))
  const initOption: EChartsOption = {
    grid: {
      left: '3%',
      right: '3%',
      bottom: '10%',
      containLabel: true,
    },
    tooltip: {
      axisPointer: {
        type: 'cross',
        label: {
          backgroundColor: '#000'
        }
      }
    },
    xAxis: [
      {
        type: 'category',
        boundaryGap: false,
        data: chartData.value.date
      }
    ],
    yAxis: [
      {
        type: 'value'
      }
    ],
    series: [
      {
        name: 'Line 1',
        type: 'line',
        // stack: 'Total',
        smooth: true,
        lineStyle: {
          width: 2
        },
        showSymbol: false,
        areaStyle: {
          opacity: 0.8,
          color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
            {
              offset: 0,
              color: 'rgba(22,93,255,0.2)'
            },
            {
              offset: 1,
              color: 'rgba(22, 93, 165,.1)'
            }
          ])
        },
        emphasis: {
          focus: 'series'
        },
        data:  chartData.value.num
      }
    ]
  };
  // 图表初始化配置
  chartInstance.value?.setOption(initOption);
};
const screenAdapter = () => {
  // 手动的调用图表对象的resize 才能产生效果
  chartInstance.value.resize({width:'auto', animation: { duration: 300 } });
};
onUnmounted(() => {
  // 销毁Echarts图表
  chartInstance.value.dispose();
  chartInstance.value = null;
  // Echarts图表自适应销毁
  window.removeEventListener('resize', screenAdapter);
});
</script>
  
<style lang="scss" scoped>

</style>